Definition of jade

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The English word jade that means “to weary” is not related to the name of the green stone jade. The origin of the earlier jade is uncertain. It was first used in Middle English to mean “a broken-down horse.” Later the word for a worthless horse was often applied to a woman (or, very rarely, to a man) considered worthless. Now a jade is more often a disreputable woman than a broken-down horse. Jaded, meaning “worn out,” is also derived from the equine jade. Originally, to jade a horse was to make a jade of it, to wear it out or break it down by overwork or abuse. It was not long before people, too, could be called jaded.